Although the 27-year-old star gave birth to son Max in January, she still managed to get back in shape.

The self confessed "junk food queen" slogged herself in the gym and tried to eat as healthily as possible to regain her sexy figure.

In fact, in her latest appearance at this week's Africa Rising gig at London's Royal Albert Hall, Christina left the audience gob smacked with her 'saucy' gig.

A video clip showing her apparently naked on a sun lounger and simulating sex preceded her Dirrty performance.

And she set the stage on fire when she appeared wearing a leopard-print swimming costume.

And as she gyrated, her dancers took it in turn to spank her.

"I'm an artist and I must express myself as I see fit. Sometimes, if there's a naughty move here or there, so be it. It's part of who I am and sexuality has always been something that I loved to express and be proud of," The Daily star quoted Christina, as saying.